CWNU 2581

0.42 UTI

0.67

C_N

0.55

C_dens

0.75

C_C3

0.06

C_lit

1.0

C_dup

N_m (P>50%) 84

Core radius and density 1.7 [pc], 2.7 [pc^-2]

C3 classification AB

C_N 0.67 Moderately populated
C_dens 0.55 Moderately dense
C_C3 0.75 High quality
C_lit 0.06 Rarely studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

MOCA 🔍 CDS 🔍 Simbad 🔍 CDS (α, δ) 🔍 Simbad (α, δ)

Overview

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CWNU 2581 is a moderately populated, moderately dense object of high C3 quality. Its parallax locates it at a moderate distance, above the mid-plane, affected by high extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster (see Parameters). It was recently reported in the literature.

Distant High extinction Near-solar metallicity Intermediate age

Palma et al. (2025)
Classified as optical pair P357, along with HSC_373.

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.13 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.13 (50th percentile).

Data

🔍 Search references for CWNU 2581 in: SciX Simbad

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Reference	Year	RA [deg]	DEC [deg]	Plx [mas]	pmRA [mas/yr]	pmDE [mas/yr]	Rv [km/s]
UCC	99999–	287.102	10.179	0.28	-0.833	-3.64	35.215
Hunt & Reffert	2024	287.102	10.176	0.27	-0.83	-3.649	33.997
Cavallo et al.	2024	287.11	10.176	0.27	–	–	–
Hunt & Reffert	2023	287.102	10.176	0.27	-0.83	-3.649	33.997
He et al.	2023	287.103	10.177	0.28	-0.834	-3.64	36.12

💡 Note: The UCC values are estimated from its identified members.

Reference	Year	Dist [kpc]	Av [mag]	DAv [mag]	Age [Myr]	[Fe/H] [dex]	Mass [Msun]	B_frac	BSS
UCC	99999–	3.38	4.23	1.38	241	-0.050	862	–	–
Hunt & Reffert	2024	3.58	4.10	1.38	231	–	862⁽¹⁾	–	–
Cavallo et al.	2024	3.18	4.36	–	309	-0.050	–	–	–
Hunt & Reffert	2023	3.58	4.10	1.38	231	–	–	–	–
He et al.	2023	2.95	4.65	–	251	–	–	–	–

(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.

Visualization

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